This manual describes the Lexmark W820 4025-XXX Finisher and contains
maintenance procedures for service personnel only. It is divided into the following
chapters:
1. General Information contains a general description of the printer and the
maintenance approach used to repair it. Special tools and test equipment are listed
in this chapter, as well as general environmental and safety instructions.
2. Diagnostic Information contains an error indicator table, symptom tables, and
service checks used to isolate failing field replaceable units (FRUs).
3. Diagnostic Aids contains tests and checks used to locate or repeat symptoms of
printer problems.
4. Repair Information provides instructions for making printer adjustments and
removing and installing FRUs.
5. Connector Locations uses illustrations to identify the connector locations and test
points on the printer.
6. Preventive Maintenance - There are no preventative maintenance procedures for
the Lexmark W820 (4025) Finisher.
7. Parts Catalog contains illustrations and part numbers for individual FRUs.

This manual describes the options for the LexmarkTM W820 printer: Envelope Feeder,
Duplex Unit, Mailbox, and High Capacity Feeder. It contains maintenance procedures for
service personnel only and is divided into the following chapters:
1. General Information contains a general description of the printer options and the
maintenance approach used to repair them. Special tools and test equipment are
listed, as well as general environmental and safety instructions.
2. Diagnostic Information contains an error indicator table, symptom tables, and
service checks used to isolate failing field replaceable units (FRUs).
3. Diagnostic Aids contains tests and checks used to locate or repeat symptoms of
printer option problems.
4. Repair Information provides instructions for removing and installing FRUs.
5. Connector Locations uses illustrations to identify the connector locations and test
points on the options.
6. Preventive Maintenance contains the lubrication specifications and
recommendations to prevent problems.
7. Parts Catalog contains illustrations and part numbers for individual FRUs.